Iti insturctor/ALP/technicianMCQ

1➤ How many number of electrons will move in one second for one ampere current through the conductors?

6.24 X 10¹⁷6.24 X 10¹⁸6.24 X 10¹⁵ 6.24 X 10¹⁶

2➤ Which part of squirrel cage rotor is short circuited?

End cover hysteresisBearingsShaftEnd rings

3➤ Which motor is used for refrigerators and air conditioners?

Capacitor start induction run motorStepper motorTwo value Capacitor motorUniversal motor

4➤ Which type of winding is done in the repulsion motor? A : B : C : D :

Compensating windingDamper winding DC lap or wave windingDistributed AC winding

5➤ Which motor operates without centrifugal switch?

Permanent capacitor motor Capacitor start capacitor run motor Resistance induction run motorCapacitor start induction run motor

6➤ How many lamps are required for parallel operation of two 3 phase alternators?

36810

7➤ What method is used for parallel operation of alternator?

Under excitation methodOver excitation methodWard - leonald methodDark and bright lamp method

8➤ Why parallel operation of alternators is necessary?

To maintain constant frequencyTo get more voltageTo share more loadsTo improve efficiency

9➤ How the alternators are rated?

KWKVARKWHKVA

10➤ What is the excitation source of a large alternator?

BatteryDC shunt generatorRectifierDC series generator

11➤ Calculate the phase current if the line current is 30 Amp in delta connection?

17.3A30A15.6A10Amp

12➤ Where two watt meter method of power measurement is used?

Half full loadUnbalanced load only Balanced and unbalanced loadBalanced load only

13➤ What is the formula for total power in three watt meter method of power measurement?

W1(W2+W3)W1+W2+W3W1 - W2W1+W2

14➤ What is the value of power factor when two watt meter readings are equal in 2 watt meter method of power measurement?

Unity 0.5 leading Less than 0.50.5 lagging

15➤ What is the angular displacement of 3 phase voltages?

360 electrical degrees180 electrical degrees90 electrical degrees120 electrical degrees

16➤ Which test is conducted to determine the winding earth leakage of a DC motor?

Open circuit testShort circuit test Continuity testGround test

17➤ What is the goal of the occupational health safety?

To keep the work place neat and cleanTo provide a safe work environment To co-operate with co-workersTo maintain discipline

18➤ What is the other name of MS-Excel?

Electronic chartElectronic documentElectronic fileElectronic spread sheet

19➤ What is the expansion of CPU?

Control Performance UnitControl Processing UnitCentral Performance UnitCentral Processing Unit

20➤ How much starting current of motor with respect to load current for calculation of cable size?

Two times of full load currentThree times of full load currentOne and half time of full load currentOne time of full load current

21➤ Which is the major reason for open circuit in armature circuit of DC machine?

Loose commulator segmentsLow voltageOver voltageOver load

22➤ Which instrument is used to measure insulation resistance of DC motor?

AmmeterVoltmeterEarth testerMegger

23➤ Which method of speed control used for variation of speed from zero to above normal?

Ward-Leonard systemShunt field control Armature controlSupply voltage

24➤ Which type of starter is used for DC series motor

Three point starterFour point starterTwo point starterDOL starter

25➤ How the burden of current transformer is expressed?

Watt hourAmpere hourVolt ampereWatt

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